Abstract: A reinforcing carrier for a flexible channel-shaped sealing, finishing, or guide strip is disclosed, comprising a series of U-form elements arranged side-by-side to define a channel, the legs of the elements being interconnected by means of short connecting links each of which extends from a point on a leg of one element to a point on the corresponding leg of the adjacent element. The two attachment points for each leg are at different distances from the base of the channel so that each connecting link is slanted with respect to the legs of the U-form element. Each leg has substantially the same flexibility at each of its points of attachment to the two legs which it interconnects, thus giving the carrier good flexibility about the longitudinal axis of the channel. The carrier is covered with resilient covering material to form the sealing, finishing or guide strip. The carrier may be produced by slitting and stretching the metal blank and then bending it into U-form.